"The Harp of God: Proof Conclusive That Millions Now Living Will Never Die," by "Judge" J.F. Rutherford. This is the first edition, published in 1921. The second edition from 1928 has some significant changes regarding the role of Pastor Charles Taze Russell. Rutherford was the second president of the Watchtower Society and named the movement Jehovah's Witnesses in 1931.